Array.push() if does not exist?

For an array of strings (but not an array of objects), you can check if an item exists by calling .indexOf() and if it doesn’t then just push the item into the array: var newItem = “NEW_ITEM_TO_ARRAY”; var array = [“OLD_ITEM_1”, “OLD_ITEM_2”]; array.indexOf(newItem) === -1 ? array.push(newItem) : console.log(“This item already exists”); console.log(array)

What does ‘–set-upstream’ do?

To avoid confusion, recent versions of git deprecate this somewhat ambiguous –set-upstream option in favor of a more verbose –set-upstream-to option with identical syntax and behavior. [ Reference ] git branch –set-upstream-to <remote-branch> sets the default remote branch for the current local branch. Any future git pull command (with the current local branch checked-out), will … Read more

What are the differences between “git commit” and “git push”?

Basically, git commit “records changes to the repository” while git push “updates remote refs along with associated objects“. So the first one is used in connection with your local repository, while the latter one is used to interact with a remote repository. Here is a nice picture from Oliver Steele, that explains the Git model … Read more

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